unforgettable
adj/ˌʌnfə(ɹ)ˈɡɛtəbəl/
Etymology From un- + forget + -able or un- + forgettable.
1
Very difficult or impossible to forget.
- The things he subjected me to were horrible and unforgettable.
- He had never seen dogs fight as these wolfish creatures fought, and his first experience taught him an unforgetable lesson. It is true, it was a vicarious experience, else he would not have lived to profit by it.1903 July, Jack London, “The Law of Club and Fang”, in The Call of the Wild, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., →OCLC, page 44:
1 more example
- The leading engine was one of the Class Y6 2-8-8-2 compound articulateds, [...] The stack noise of one of these great brutes slogging up a grade was quite unforgettable.1961 July, J. Geoffrey Todd, “Impressions of railroading in the United States: Part Two”, in Trains Illustrated, page 419:
- Derived terms
- unforgettableness, unforgettably